Comment by raverbashing

Well, because some people have no sense. Especially people with a reduced educational background. Sometimes it's for 'evil purposes' as well.

Oh, and in Iceland they use patronyms, it means her son/daughter will be called ("last name") Blaersson/Blaerdóttir (something like that)

Edit: see comment below, son/daughters have their father's name, not mother's.